.midea nav {
    display: flex;
    /* padding: 10px; */
    /* box-sizing: border-box; */
    justify-content: space-evenly;
    background: white;
}

.midea nav a {
    color: black;
    text-decoration: none;
}

.midea .icon {
    /* background: url(../image/2.png) no-repeat fixed; */
    padding: 10px;
    width: 100px;
    height: 70px;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
}

.midea .icon img {
    width: 100%;
}

.midea .nav-box {
    height: 72px;
    display: flex;
    line-height: 35px;
}

.midea .nav-box li {
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    height: 72px;
    list-style: none;
    padding: 10px;
    position: relative;
}
.midea .hidden-box li{
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.midea .hidden-box {
    position: absolute;
    left: 0;
    top: 0px;
    width: 100vw;
    height: 0px;
    overflow: hidden;
    background: #225560;
    /* opacity: 0.1; */
    box-sizing: border-box;
    padding-top: 70px;
    padding-left: 200px;
    z-index: -1;
    transition: 1s;
    /* display: flex; */
    font-size: 1.6vw;
    color: white;
    /* margin-top: 100px; */
}
.midea .hidden-center-box{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}
.midea .nav-box .menu::before{
    content: "";
    position: absolute;
    bottom: 18px;
    width: calc(100% - 20px);
    height: 1.5px;
    background: #000;
    display: none;
}
.midea .hidden-box a {
    margin-top: 10px;
    display: block;
    transition: 1s;
    color: white;
    position: relative;
}
.midea .hidden-box a::before{
    content: attr(data-text);
    color: transparent;
    position: absolute;
    font-size: 16px;
    bottom:0;
    left: 0;
    width: 0;
    height: 1px ;
    background: #ffffff;
    transition: .5s;
}
.midea .hidden-box a:hover::before{
    width: 100%;
}

.midea .hidden-box a:nth-of-type(1) {
    margin-top: 50px;
}

.midea .nav-box li:nth-of-type(1):hover~.hidden-box:nth-of-type(1),.hidden-box:nth-of-type(1):hover {
    height: 450px;
}
.midea .nav-box li:nth-of-type(2):hover~.hidden-box:nth-of-type(2),.hidden-box:nth-of-type(2):hover {
    height: 450px;
}

.midea .nav-box li:nth-of-type(6):hover~.hidden-box:nth-of-type(3),.hidden-box:nth-of-type(3):hover {
    height: 450px;
}

.midea .nav-box li:nth-of-type(7):hover~.hidden-box:nth-of-type(4),.hidden-box:nth-of-type(4):hover {
    height: 450px;
}
.midea .nav-box .menu:nth-of-type(1):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(2):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(3):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(4):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(5):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(6):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(7):hover::before{
    display: block;
}
.midea .nav-box .menu:nth-of-type(8):hover::before{
    display: block;
}